大口径火炮机械自紧是提高火炮机械性能及寿命行之有效的方法之一，因此国外应用的国家愈来愈多。 我厂１９８６年引进了大口径火炮身管液压机械自紧的新技术。在这项技术中自紧前处理各工艺所有化学药品均采用德国Ｂｏｎｄｅｒ公司的产品。为了摆脱对国外的依赖，我们花费了很 Large caliber artillery self-tightening is one of the effective ways to improve the mechanical properties and life span of artillery. Therefore, there are more and more countries abroad. I plant in 1986 introduced a large caliber gun barrel hydraulic self-tight new technology. In this technology, all the chemicals that have been processed before the close of the process adopt the German company Bonder. In order to get rid of dependence on foreign countries, we spent a lot